Genetic diversity and population structure of Siberian fir (Abies sibirica Ledeb.) in middle Siberia, Russia
2007
Larionova, A.Y.(V.N. Sukachev Inst. of Forests, Krasnoyarsk (Russian F.)) | Ekart, A.K. | Kravchenko, A.N.
The genetic diversity and population structure of Siberian fir (Abies sibirica Ledeb.) in Middle Siberia were studied on the basis of allozyme variation analysis at 20 loci. The vegetative buds collected from 260 trees in nine populations representing different geographical localities and altitudinal sites were used as materials for study. Horizontal starch gel electrophoresis was applied to analyze the isozyme patterns of 11 enzyme systems. 20% of the gene loci assayed were revealed to be polymorphic at 95%, and 35% at a 99% criterion. The mean number of alleles per locus, the mean observed heterozygosity, the mean expected heterozygosity, and the effective number of alleles were equal to 1.45, 0.0569, 0.0642 and 1.13, respectively. More than 95% of total genetic variation was within each population and only 5.24% (Fsub(st)=0.0524) was among the populations. The mean value of Nei's genetic distance, D among the populations ranged from 0.0005 to 0.0098 and averaged 0.0040. The obtained data indicates a low level of genetic diversity and a weak differentiation among the A. sibirica populations studied in Middle Siberia. The most significant difference in structure was that between Kozulka and Western Sayan, 1000 (D=0.0098). Within mountain populations of Siberian fir from Western Sayan the most essential statistically significant differences were between low altitudinal (Western Sayan, 400) and high altitudinal (Western Sayan, 1500) populations (D=0.0060).
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